first off,you never want to use propecia with deca. deca itself converts to dhn,not dht. dhn is a very weak androgen witha very weak affinity to the scalp. using propecia will prevent deca's conversion to dhn,thus causing more hair loss. theoretically,propecia only works with testosterones,not derivatives.
although primobolan is a weak androgen,it does have properties similar to dht as does winstrol,this could explain hairloss from both of these drugs. the are derivatives of dht,not actual dht but similar in structure.
anavar and deca is a safe cycle for hairloss but don't use propecia during this.
Anabolic steroids differ in their characteristics, which means there are steroids that are only suitable for specific uses. For instance, Trenbolone is not recommended for bulking but it is an outstanding fat burner. This makes it perfect for a lean mass cycle or a cutting cycle. Always take the side effects of a particular compound into consideration whenever you plan a stack. Do not combine anabolic steroids that show similar side effects. For example, never combine Anapolon and Dianabol because they are already quite toxic and if you combine them, the toxicity will increase exponentially and cause serious damage to your body.